Eighty-two patients aged =70 years with heart failure were randomized to a gentle, seated exercise program or to usual care. Six-minute walk distance and quality of life did not change between groups, but daily activity as measured by accelerometry increased in the exercise group relative to the control group.
Witham, M. D., Gray, J. M., Argo, I. S., Johnston, D. W., Struthers, A. D., & McMurdo, M. E. T. (2005). Effect of a seated exercise program to improve physical function and health status in frail patients ≥70 years of age with heart failure. American Journal of Cardiology, 95(9), 1120-1124. https://doi.org/10.1016/j.amjcard.2005.01.031